设计模式学习之外观模式（Facade,结构型模式）（8）

 private static void Main(string[] args)
        {
            //外观，封装子系统
            Mortgage mortgage = new Mortgage();

            Customer customer = new Customer("Ann McKinsey");
            bool eligable = mortgage.IsEligible(customer, 125000);

            Console.WriteLine("\n" + customer.Name +
                " has been " + (eligable ? "Approved" : "Rejected"));
            Console.ReadLine();
        }
        //顾客类
        public class Customer
        {
            private string _name;

            public Customer(string name)
            {
                this._name = name;
            }

            public string Name
            {
                get { return _name; }
            }
        }

        //银行子系统
        public class Bank
        {
            public bool HasSufficientSavings(Customer c, int amount)
            {
                Console.WriteLine("Check bank for " + c.Name);
                return true;
            }
        }

        //信用子系统
        public class Credit
        {
            public bool HasGoodCredit(Customer c)
            {
                Console.WriteLine("Check credit for " + c.Name);
                return true;
            }
        }

        //贷款子系统
        public class Loan
        {
            public bool HasNoBadLoans(Customer c)
            {
                Console.WriteLine("Check loans for " + c.Name);
                return true;
            }


        }

        public class Mortgage
        {
            private Bank bank = new Bank();
            private Loan loan = new Loan();
            private Credit credit = new Credit();

            public bool IsEligible(Customer cust, int amount)
            {
                Console.WriteLine("{0} applies for {1:C} loan\n",
                  cust.Name, amount);

                bool eligible = true;

                if (!bank.HasSufficientSavings(cust, amount))
                {
                    eligible = false;
                }
                else if (!loan.HasNoBadLoans(cust))
                {
                    eligible = false;
                }
                else if (!credit.HasGoodCredit(cust))
                {
                    eligible = false;
                }

                return eligible;
            }
        }